Polarized ink-writer



' Patented Nov. 21, 1882.

INVENTOR Fly.

ATTORNEY UNITED STATES FPATENT OFFIQE.

FRANK vANDERSON, oEPE KsKtLL, NEW YORK, ASSIGNOR TOTHE AMERICAN RAPIDTELEGRAPH COMPANY, OF ooNNEoHoUT.

POLARIZED lNK-WRITER.

SPECIFICATION forming part of Letters Patent No. 267,967, dated November21, 1882.

Application filed December 10, 1881. (N6 model.)

. To all whom it may concern:

Be it known that I, FRANK ANDEEsoN, of

Peekskill, in the county of Westchester and mark, the other oropposite'impulse' serving.

only to withdraw the pen or stop it from marking, so that tomake, say,three dots or marks six impulses over the line would be required.Instruments have also been devised containing double pens, one of whichis brought into contact with the paper by a positive and the other by anegative current, both pens, howlever,when not acted upon by thecurrent, being drawn bacli from the paper either by gravity or a spring.In this case either one of the pens may be applied repeatedly, or theymay be made to alternate with each other, but neither is appliedto thepaper, except during the continuance of the impulse.

The object of my invention is to cause a marker record for each impulse,both positive and negative, thereby doubling the capacity fortelegraphic characters, and to form a continuous record in which themarks in the two lines necessarily alternate with each other. Theutilization of both currents in the production of arecord has alreadybeen accomplished in the chemical recorder, as shown in the patent ofFoote and Randall, No. 172,409, of J anuary 18, 1876. In my inventionthis end is attained, in the case of a polarized ink-writer with thesame system of transmission, by providing two pens or' inkwheels mountedin independent bearings, and so connected to the polarized armature ofthe magnet that the vibration of said armature will cause first one andthen the other of the pens or wheels to be pressed against the movingstrip which re ceives the record, each pen remaining upon the stripuntil the other is moved into contact intervals, alternate in polarity.

by an impulse of opposite polarity. By this instrument and method thelength of the mark .made by the pen or wheel depends not upon thecontinuation of the impulse, but upon the space between the impulses.

While this ink-writer may-be used with the ordinary form of relay, inwhich the armature is moved one way by a spring or equivalent device, orwith other forms of magnets, it is designed more especially to be usedin connec tion with a system of transmission in which all impulses,whether they occur at great or small This is now accomplished by thechemical method; but by my invention 1 accomplish the same resultswithout the use of the chemically-prepared paper, which needs to be keptdamp in order to secure'any result.

The accompanying drawings and description ,hereinafter given show adevice embodying my invention, in which- Figure 1 is a perspective viewof the instrument with the paper strip and devices for moving the sameremoved. Fig. 2 is a plan of part of the same. Fig. 3 is an elevation ofsame, showing paper, Sac. Fig. 4: is a top view of magnet and armature.Fig. 5 is a side elevation of the same, with ink-wheels or pens. Fig. 6represents a modification of the device for moving the wheels or pens.Fig. 7 shows the record upon'a fillet.

The polarized ink-writer-a well-known device-is made by attaching a penor ink-wheel to the armature of a polarized relay, so that the action ofthe latter pushes the pen or wheel alternately against and away from a.moving strip of paper.

In carrying out my invention, instead of one wheel or pen I 'use two,marked E E. (Shown in Figs. 2, 3, and 5 as placed side by side onindependent arms or levers f f.) These levers are pivoted at the-pointse c, and are made as light as possible. Fixed to these levers, andextending downward from the fulcrum or pivots e, are arms 0 c, whichform, with levers f f, 5

bell-crank levers, and engage at their lower ends with notches 0 c inthe cross-piece d, which is attached to the armature A, so thatlongitudinal movement of the cross-piece will rock the levers on pivotse c and raise or lower IOO the wheels or pens E E. This movement of thecross-piece is caused by its connection with the armature, which hassufficient space therefor between the extension-pieces b b of the 7cores 1) b, which pieces are practically a divided end of the permanentmagnet, when the cores are not under the influence of the current.

A modification of the devices for operating the wheels is shown in Fig.6, in which a repre-' sen ts a rea r prolongation of the armature,forming an arm (made as light as possible) which carries one of thewheels E. The other-(marked in this figure E) is carried on a short arm,n, which is pivoted on a fixed standard by the side of the arm n. A pin,00, connects the two arms 12 and n, and the vibration of the armaturemoves the wheels or pens simultaneously in opposite directions.

In the drawings the armature is represented as midway between the polesb b, and theinkwheels as even in height with each other. It is apparentthat as the armature nears one of the poles one of the pens or wheels isdepressed while the other is raised.

F represents the paper on which the record is made. It is caused to moveover the roller G, which isnear enough to the pens to allow one of themto touch it when the armature is against either pole. Motion (by crankor clockwork) is communicated to the paper by the rotation of roller H,between which and the pressure-roller h the paper passes. The samemechanism that moves the paper can be made to revolve the ink-wheels, ifdesired, so as to keep a distribution of ink constantly. The wheels arepartially immersed in a vessel, I, filled with ink.

A fountain pen or pens can be used instead of ink-wheels; or anink-ribbon in form of a continuous band or otherwise may be substitutedfor the ink, in which case either sharpedged wheels or a pointed stylewould sufficiently mark the paper.

In the transmitted impulses which are alternate in polarity the lastimpulse will leave the for dashes one or two impulses are omitted in thetransmitting.

It is evident that there can be no blank spaces left on the recordedstrip, because one or the other of the pens will always be against thepaper, and of course will mark it, so it is necessary to have a mark forthe space between letters and words. By making this mark or dash longerthan any dash composing a letter it may be easily recognized.

Fig. 7 shows the appearance of the record of character representing theletters S N, &c.

The mechanism for causing the alternating movement of the ink-wheels maybe greatly varied without departing from the spirit of my invention. I

I am aware that instruments containing a double style or marking devicehave been used, as in the case of Steinheil, Wheatstones earlierdevices, the English patents of 18 7, No. 3,608, and of 1869, No. 2,603;but in none of these devices were the movements of the pens necessarilyof an alternating character, neither was the record of a continuousnature, as it necessarily is in my device; but the styles were soarranged that neither touched the paper when there was no current, buteither could be made to touch repeatedly while the other remainedstatio'narya condition of things that is not possible or desirable inmy, device, as I aim to produce acontinuous record, which may shift fromone side to the other, but never leaves a blank space when properlyoperated.

Having thus described my invention, what I claim is- The combination ofthe levers ff, carrying wheels or pens, spring-arms c 0, bar (1, andpolarized armature, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRANK ANDERSON.

Witnesses:

RUFUS ANDERSON GQLERIDGE A. HART.

